This du'a is narrated on the authority of
Imam Musa al-Kazim, peace he upon him, and it is said that it is a
very effective supplication, having all the merits of al
Jawshan al Kabir." Sayyid ibn Tawus in his book
Muhaj al dawat have narrated that Imam Kazim (a.s.) used to recite this
dua when he knew that the Abbaside caliph was planning to kill him"